Google trained lots of cameras on Cambodia's temples to add them to its library of historic sites that you can see from Street View on its maps. The company said it stitched together 90,000 new images to show off the sites.

Angkor, Cambodia, has ruins from capitals of the Khmer Empire that date from the 9th to the 15th century. UNESCO describes it as "one of the most important archaeological sites of Southeast Asia," with scores of temples -- including the famous Angkor Wat -- reservoirs, communication routes and more. The 400-square-mile site has had a huge influx of visitors in recent years, which has led some conservationists to voice concerns about preserving it; UNESCO says 4 million tourists are expected to visit this year, up from just 22,000 in 1992.

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Comments our editors find particularly useful or relevant are displayed in Top Comments, as are comments by users with these badges: . Replies to those posts appear here, as well as posts by staff writers.